geometry unit tests: shut down nc in finalizer

tests/geom.cpp

@@ -42,4 +42,6 @@ TEST_CASE("Geometry") {
     }
   }
 
+  CHECK(0 == notcurses_stop(nc_));
+
 }

tests/metric.cpp

@@ -19,7 +19,7 @@ char* impericize_ncmetric(uintmax_t val, unsigned decimal, char* buf,
   return buf;
 }
 
-TEST_CASE("ncmetric") {
+TEST_CASE("Metric") {
   const char* decisep = localeconv()->decimal_point;
   REQUIRE(decisep);
   REQUIRE(1 ==  strlen(decisep));